On Friday, Qatari Emir Sheikh Tamim bin Hamad Al Thani said his country is ready for dialogue to resolve the crisis, but stressed that any solution must respect Qatar's sovereignty.

"We are open to dialogue to resolve the outstanding problems [so long as Qatar's] sovereignty is respected," Al Thani said in his first televised address on since the four Arab states cut ties with Qatar.

Hariri and Trump also discussed Lebanon's efforts to protect its borders against Islamic State of Iraq and the Levant (ISIL, known as ISIS) fighters and other armed groups.